This is a 27-year-old woman, with unremarkable past obstetrical history, scanned at 14.2th week of gestational age. The ultrasound revealed a defect of the fetal sacrum (spina bifida) and massively dilated urinary bladder with distend abdominal wall and compressed thorax. The findings were consistent with urethral obstruction due to the urethral agenesis. The amount of the the amniotic fluid was normal as the scan was performed during early pregnancy. Postnatal investigation confirmed the diagnoses.

Images 1, 2: The images show massively dilated urinary bladder of the fetus due to the urethral agenesis.

Images 3, 4: The images show widely opened spina bifida at the level of the fetal sacrum.